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path: root/src/libsyntax/ext/pipes/pipec.rs
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Diffstat (limited to 'src/libsyntax/ext/pipes/pipec.rs')
-rw-r--r--src/libsyntax/ext/pipes/pipec.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax/ext/pipes/pipec.rs b/src/libsyntax/ext/pipes/pipec.rs
index 5ea9257d583..eafe871a288 100644
--- a/src/libsyntax/ext/pipes/pipec.rs
+++ b/src/libsyntax/ext/pipes/pipec.rs
@@ -54,7 +54,7 @@ impl gen_send for message {
           message(ref _id, span, ref tys, this, Some(ref next_state)) => {
             debug!("pipec: next state exists");
             let next = this.proto.get_state(next_state.state);
-            assert next_state.tys.len() == next.generics.ty_params.len();
+            fail_unless!(next_state.tys.len() == next.generics.ty_params.len());
             let arg_names = tys.mapi(|i, _ty| cx.ident_of(~"x_"+i.to_str()));
             let args_ast = vec::map2(arg_names, *tys, |n, t| cx.arg(*n, *t));